The White House said late Thursday afternoon that a 'final decision' had not been made on Syria.

Donald Trump said earlier in the day that Americans won't have to wait long for a response to Saturday's horrifying chemical weapons attack on a rebel-held town that left at least 40 dead and others gasping for air.

But at least two of his top advisers couldn't agree on whether there's sufficient proof to blame the atrocity on dictator Bashar al-Assad's government, leaving the possibility of a retaliatory attack an open-ended question.

America's allies and adversaries alike were awaiting a signal from the White House about whether Trump will follow through on his warning that missiles 'will be coming,' potentially putting Russian troops in harm's way.